Page 5
For technical questions, please call 1-800-444-3353.
Air Ratchets
Functional Description
Specifications
Max. Air Pressure
90 PSI
Air Inlet
1/4” -18 NPT
Maximum Torque
68428
1/4” Air Ratchet
68426
3/8” Air Ratchet
68427
1/2” Air Ratchet
40 ft.-lb.
70 ft-lb.
75 ft.-lb.
Average Air
Consumption
4 CFM @ 90 PSI
* Maximum torque is stated maximum air
pressure. Excess air pressure is hazardous and
may cause tool failure or personal injury.
Components and Controls
Initial Tool Set Up/Assembly
Read the ENTIRE IMPORTANT
SAFETY INFORMATION section at the
beginning of this manual including
all text under subheadings therein
before set up or use of this product.
Note:
For additional information regarding the
parts listed in the following pages, refer to the
Assembly Diagram near the end of this manual.
Unpacking
When unpacking, make sure that the item is
intact and undamaged. If any parts are missing
or broken, please call Harbor Freight Tools at
1-800-444-3353 as soon as possible.
• This air tool may be shipped with a
protective plug covering the air inlet.
Remove this plug before set up.
Air Supply
TO PREVENT SERIOUS INJURY
FROM EXPLOSION:
Use only clean, dry, regulated, compressed
air to power this tool. Do not use oxygen,
carbon dioxide, combustible gases, or any other
bottled gas as a power source for this tool.
1. Verify compressor is not running during setup. Then
incorporate a filter, regulator with pressure gauge,
oiler, in-line shutoff valve, and quick coupler for
best service, as shown on Figure A on page 6
and Figure B on page 7.
An in-line shutoff
ball valve is an important safety device because
it controls the air supply even if the air hose
is ruptured. The shutoff valve should be a
ball valve because it can be closed quickly.
Note:
If an automatic oiler system is not
used, add a few drops of Pneumatic Tool Oil to
the air inlet before operation. Add a few more
drops after each hour of continual use.
2. Attach an air hose to the compressor’s air outlet.
Connect the air hose to the air inlet of the tool.
Other components, such as a quick connect
plug and quick connect coupler, will make
operation more efficient, but are not required.
WARNING! TO PREVENT SERIOUS INJURY
FROM ACCIDENTAL OPERATION:
Do not install a quick coupler on the tool.
Such a coupler contains an air valve that will
allow the air tool to retain pressure and operate
accidentally after the air supply is disconnected.
Note:
Air flow, and therefore tool performance, can
be hindered by undersized air supply components.
3. The air hose must be long enough to reach
the work area with enough extra length to
allow free movement while working.
4. Turn the tool’s throttle or switch to the off position;
refer to Operation section for description of controls.
5. Turn on the air compressor according to
the manufacturer’s directions and allow it
to build up pressure until it cycles off.
6. Adjust the air compressor’s output regulator so
that the air output is enough to properly power
the tool, but the output will not exceed the tool’s
maximum air pressure at any time. Adjust
the pressure gradually, while checking the air
output gauge to set the right pressure range.
Throttle
Lever
Air Inlet
Anvil
Direction
Lever
